Multiple bit boring machine with reciprocating heads



Aug. 30, 1932. c. P. PARK 1,874,607

ING MACHINE WITHRECIBROCATING HEADS MULTIPLE BIT BOR 2 Sheets-Sheet 1Filed Jpn. 15. 1951 40 Hv9 I 1 INVENTOR.

ATTORNEY.

Aug. 30, 1932. g, p, PARK 1,874,607

MULTIPLE BIT BORING MACHINE WITH RECIPROCATING HEADS Filed Jan. 15, 19312 Sheets-Sheet 2 A I I VI/MMI/WRI Patented Aug. 30, 1932 UNITED STATESPATENT OFFICE CARL PALMER PAR-K, OF MANCHESTER, NEW HAMPSHIRE, ASSIGNORTO U. S. BOBBIlV & SHUTTLE COMPANY 1929, OF PROVIDENCE, RHODE ISLAND, ACORPORATION OF RHODE ISLAND MULTIPLE BIT BORING MAGHINEWITHREGIPROCATING HEADS Application filed January 15, 1.981. Serial No.508,949.

. This invention relates to multiple bit or multiple spindle boringmachines especially adapted for boring wood.

Its particular use is to bore a plurality of straight, clean, parallelholes in certain types of wooden barrels for spools used in the textileindustry and particularly for those used in winding silk and ray-on.

It is especially useful in the process of :1

i semblings pools for steaming yarn, especially silk yarn, of the typethe same or similar to those shown in patent to Bray, :lt 1,654,525 onsteam bobbins patented January 3, 1928.

The barrels of such spools have a central hole and a plurality of otherholes all of which are reentorced or lined with metal tubes. These tubesare afterwards bored with a plurality of radial holes whereby steam canenter through the ends or through these latter 90 or vice versa.

The particular novel feature of this machine is the arrangement wherebyoppositely disposed conical chucks are caused to seize and center theblank barrel after which oppositely disposed bits or other boring toolsare advanced with their respective heads until the tips of the bits areperhaps one quarter of an inch :from each other whereupon one set iscaused to continue in the advance while the other set recedes keeping,however, at the same distance from the other set of bits.

Preferably this is all accomplished by a continuous movement of a handlewhich, as shown, is manually operated.

It is obvious, however, that this handle could be operated by power, ifdesired.

"In the drawings, Fig. 1 is a front elevation Fig. 2 is a plan view withthe blank carrier thrown back.

Fig. 3 is an enlarged plan view with the blank carrier in place holdinga blank.

Fig. 4 is a vertical sectional detail of the chuck jaws holding a blank.

partly in section showing the different positions of the parts in theoperation of the machine. g

In the drawings, A represents the frame which, as shown, is supportedcentral y asby a column 6.

Two sets of arms 7, 7, and :8, 8, are rigidly carried by brackets 3, 3and 2, 2 fixed to the part 1 of frame A and these pairs of armsrespectively support the motor and track supports 46 and .56.

The motors 17 and 18,.shown as of the elec tric type and as driven bywires in conduits 19 and 119 are carried by supports 46 and 56 andparallel tracks B, B, extend between them. Other types of motors ordriving mean-s mi 'ht be used in place of electric.

1 H represents a fixed holder and H a movable holder slidable betweenthe tracks B, B. Ordinarily movable holder H is drawn towards the fixedholder H as by tension springs 20 and 21.

Through holders H and H are the operating rod holes 22, 23, 24 and 25through vvbliich the operating rods B and R are slida e.

The chucks C and C are carried centrally by holders H and H each chuckbeing of the conical type and each having four holes such as 31, 32, 33,34 and 131, 132, 13.3, 134 in position oppositeto each other.

D and D represent multiple bit heads partly supported by and slidablerespectively with travellers and which are slid-able along the headguide tracks B, and really form part of each head respectively. Theseheads are shown as having cylindrical barrels 45 and which slide in andout of the fixed supports 46 and 56.

The heads are so constructed inside that a set of boring bits 41, 42,43, 44 or 51., 52, 53, 54 are revolved at high speed and at the sametime the head can slide back and forth along the head guide tracks B, Bwhen caused so to do as the action of the links L and M to be described.

It is not deemed necessary "to describe the interior construction ofthese heads as they are of a well known type.

K is aha-ndle attached to a turn table '70 which serves as a pivot beingrevoluble horizontally on frame A.

This turn table 70 may be considered as all part of the handle K as itmay be replaced y anyother mechanism or device for operatin the links Land M.

is a rigid'link pivoted at 7 2 to turn table .70 in aposition whichmakes it in effect ivoted to a short arm extension of handle I behandle93 by which it can be lifted and is yond the center of movement. end 74is pivoted to the head D The link M isof the extensible type andincludes the telescoping members 84 and 85 including a spring 86 insidethe outer member 84 whichtends to force the male member This link M ispivoted at 82 to turn table 70 in a position which makes itsubstantially pivoted to the long arm of handle K or on the oppositeside of the pivot from link L.

The other end of the extensible link M is pivoted to the head D at 184.

The operating rods R and R are adjustably attached to the head D as bybeing .screwedinto place and'held in position by check nuts 60 and 61against traveller 40.

They extend respectively through the holes 22, 23 and 24, 25 in holdersH and H which serve as guides.

T is a cradle pivoted at 90 to and slidable on rod 91 between brackets92, 92 fastened to one of the tracks B in such a manner that it can bethrown back out of the way, as shown in Fig. 2. i

This cradle T, as shown in Fig. 2, has a curved at 94 in. such a waythat when a "blank barrel, such as P, is dropped into it, it

will rest between the chucks C and C in such a position that when theyare moved together or when C is moved towards C the end 96 of H willengage 90 and carry T with it and blank will be picked up and centered.

The arrangement of the bits and their guide holes shown includes centerbits 41 and 51 and surrounding bits 42, 43, 44 and 52, 53, 54 all thoseon head D being arranged as nearl opposite those on D as is possible andthe guide holes in the holders H and H being also arranged in suitablealinement.

The operation is as follows:

The off position is, shown in Fig. 2 where the handle is over at theextreme left and cradle T is thrown back.

. When moved to the off position, the end 96 of H engages collar on rod91 and moves cradle T over to the left.

In this position adjustable collars F and F 2 on operating rods R and Rforce the holder H with its chuck C away from the holder H and thechuckC The cradle T is thrown over between the tracks and a blank P isdropped into it.

Handle K is moved to the right which allows chuck C to move up towards Cand Its other this lifts and centers the blank P and thereafter holds itfirmly in place.

The handle is moved along more to the right, as shown in Fig. 5, and thebits enter the material from each side continuing as far as the positionshown in Fig. 6 where their tips may be one quarter of an inch apart.

Up to this point the two links L and M have acted together and the twoheads D and D have moved at the same speed towards each other.

At this time in the motion, the tips 68 and 69 of the operating rods Rand R strike the head D and prevent further movement of the heads D andD towards each other, but as the movement of the handle continues stillfurther to the right, as shown in Fig. 7, the link L carries the head Dto the left and the rods R and It? force the head D to the left, thusextending link M. v l

This causes the, bits 41, 42, 43, 44 to retract and the bits 51, 52, 53,54 to cut through the intervening space and also to run up into theholes which the other bits 41, 42, 43, 44 have already bored, as shownby comparing Fig. 6

with Fig. 7. i

While the multiple bit heads D and D are of wellknown construction andwell known articles ofcommerce, they must be slidable at the same timethat the bits revolve.

As typical of the construction see Fig. 4C in which a central gear 101carries a bit 41 and is itself carried by a shaft not shown which canslide in and out as from the head D to the motor 17.

The gears 102, 103 and 104 are driven by 101 and each carries a bit suchas 42, 43 and 44.

I claim:

1. In a multiple bit boring machine, the combination of a frame havinghead guide TV tracks; two chuck holders onebeing movable towards andfrom the other parallel with said tracks, and tension springs betweensaid chuck holders; two conical chucks facing each other each chuckbeing carried by a holder and having a plurality of alined bit holes;two heads slidable to and from each other on the head guide tracksparallel with the holes each rod in position to move the movable chuckholder away from the other; an operating handle centrally pivotedbetweenand below the chucks, said handle having ashort arm which extends beyondthe pivot; an extensible link including telescoping members and atension spring, said extensible link being pivoted at one end to thelong arm of the handle and at the other end to the head which carriesthe operating rods; and a rigid link pivoted at one end to the short armof the handle and at the other end to the other head.

2. The combination in a multiple bit boring machine of a frame havingparallel head guide tracks; of chuck holders; blank holding chuckscarried by said holders each hav- .ing a plurality of alined holes withtwo heads slidable to and from each other on head guide tracks parallelwith the holes in said chucks, each head carrying a plurality ofrevoluble boring bits, the bits on one head pointing to and in line withthose on the other head and in line with the holes in the chucks;operating rods adjustably fixed to one head and extending parallel withsaid tracks; collars on said rods to move one chuck holder; a handlepivoted near one end between and below the chucks; a link pivoted at oneend to the end of the handle and at the other end to a head; and anextensible link including a tension spring, said link being pivoted atone.

end to the handle and at the other end to the other head.

3. The combination in a multiple bit boring machine of a frame havingparallel head guide tracks; and blank holding chucks positioned betweenthe tracks each chuck having a bit passage; with two heads slidable toand from each other on the head guide tracks, each head carrying aplurality of revoluble boring bits, the bits on one head pointing to andin line with those on the other head and parallel with the tracks;operating rods adjustably fixed to one head and extending parallel withsaid tracks; a handle pivoted near one end between the chucks; a linkpivoted at one end to one head and at the other I end to the handle atone side of its pivot; and an extensible link pivoted at one end to theother head and at its other end to the handle on the other side of thehandle pivot.

4. The combination in a boring machine of a frame having parallel headguide tracks; and blank holding chucks positioned between the trackseach chuck having a bit passage; with two heads slidable to and fromeach other on the head guide tracks, each head carrying a revolubleboring bit, the bit on one head pointing to and in line with that on theother head and parallel with the tracks; operating rods, adjustablyfixed to one head and extending parallel with said tracks; a handlepivoted near one end between the chucks; a link pivoted at one end toone head and at the other end to the handle at one side of its pivot andan extensible link pivoted at one end to the other head and at its otherend to the handle on the other side of the handle pivot.

CARL PALMER PARK.

